Sulfated ZrO2 dispersed MCM-41 as an efficient catalyst in the production of polyoxymethylene dimethyl ether, an alternative for diesel: Brønsted acid sites key to its selective formation

IF 4.8 3区材料科学 Q1 CHEMISTRY, APPLIED

Microporous and Mesoporous Materials Pub Date : 2025-03-14 DOI:10.1016/j.micromeso.2025.113593

Mahesh Dumpalapally , Sasikumar Boggala , Hari Padmasri Aytam , Kalpana Manda , Ashok Jangam , Venu Boosa , Anjaneyulu Chatla , Sreedhar Inkollu , Venugopal Akula

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Abstract

MCM-41-supported sulfated zirconia (SO₄²⁻/ZrO₂/MCM-41) was identified as an efficient catalyst for the generation of polyoxymethylene dimethyl ether (PODE) from the polymerization of dimethoxymethane (DMM) with 1,3,5-trioxane (TOX). The type of acid sites involved and their surface conditions are deduced from NH₃-TPD and pyridine-adsorbed IR techniques that revealed strong acidic site presence, which was responsible for its superior catalytic efficiency. Strong Brønsted acidic sites on the SO₄²⁻/ZrO₂/MCM-41 catalyst surface led to a 72 % DMM conversion and a 42 % selectivity, with the desired chain length of PODE_3-5. The IR and XPS analyses confirmed the existence of sulfate moieties on the catalyst surface. The experimental results showed stable catalytic activity up to four recycles without any leaching of the sulfate moiety.

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.